From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 15 May 2026 08:55:58 +0000 (+0200)
Subject: ALSA: asihpi: Fix potential OOB array access at reading cache
X-Git-Tag: v7.1-rc5~27^2~17
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=7b7d6572145c1dab2dd9bfb550b188e5f0ff3c3f;p=thirdparty%2Fkernel%2Flinux.git

ALSA: asihpi: Fix potential OOB array access at reading cache

find_control() to retrieve a cached info accesses the array with the
given index blindly, which may lead to an OOB array access.
Add a sanity check for avoiding it.

Link: https://sashiko.dev/#/patchset/20260511230121.28606-1-rosenp%40gmail.com
Cc: <stable@vger.kernel.org>
Link: https://patch.msgid.link/20260515085606.242284-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/pci/asihpi/hpicmn.c b/sound/pci/asihpi/hpicmn.c
index d846777e7462b..19f0da2e65014 100644
--- a/sound/pci/asihpi/hpicmn.c
+++ b/sound/pci/asihpi/hpicmn.c
@@ -276,6 +276,12 @@ static short find_control(u16 control_index,
 		return 0;
 	}
 
+	if (control_index >= p_cache->control_count) {
+		HPI_DEBUG_LOG(VERBOSE, "control_index out of bounce %d\n",
+			control_index);
+		return 0;
+	}
+
 	*pI = p_cache->p_info[control_index];
 	if (!*pI) {
 		HPI_DEBUG_LOG(VERBOSE, "Uncached Control %d\n",